Radial precompression tooling and method for metal rubber ball joint

Abstract

Metal rubber ball joint radial precompression tooling, including a base positioned on a horizontal workbench, the base is a cylindrical structure with an upward opening, and also includes an extrusion cylinder assembly for radially extruding the metal rubber ball joint. For pressing down the pressure head assembly of the metal rubber ball hinge, the extrusion cylinder assembly is coaxially placed on the base, the pressure head assembly is coaxially arranged directly above the extrusion cylinder assembly, and is hoisted on the hydraulic cylinder of the hydraulic press, and the metal rubber ball hinge is placed along the It is vertically supported on the extrusion cylinder assembly, pressed down with the pressure head assembly, and then falls into the base after being radially extruded by the extrusion cylinder assembly. The invention realizes one-time extrusion molding with a slightly larger extrusion amount, reduces mold manufacturing costs, and reduces processes; realizes automatic operations and improves production efficiency; ensures that the upper and lower parts of the entire tooling are coaxial, and realizes a slightly larger metal rubber ball joint simply, efficiently and reliably Compression Radial pre-compression. The invention also provides a radial precompression method of the metal rubber ball hinge.

Description

technical field [0001] The invention relates to a metal rubber ball joint radial precompression tooling and a method, which are used for radial precompression of the metal rubber ball joint. Background technique [0002] In order to improve the fatigue strength and service life of metal-rubber ball joints, it is necessary to carry out radial precompression on metal-rubber ball joints through certain processes and devices. The existing process methods and molds for shrinking the metal outer diameter of rubber metal products There are many kinds, mainly divided into two types: radial clamping type diameter reduction where the workpiece does not move and axial extrusion type diameter reduction when the workpiece moves. [0003] The paper "Research on the Application of Radial Diameter Reduction Technology in Ball Joints of Oil Pressure Shock Absorbers" (CN61-1141 / TQ) mentioned the radial diameter reduction method of ball joints. The radial diameter reduction method described in...

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Problems solved by technology

[0003] The paper "Research on the Application of Radial Diameter Reduction Technology in Ball Joints of Oil Pressure Shock Absorbers" (CN61-1141 / TQ) mentioned the radial diameter reduction method of ball joints. The radial diameter reduction method described in the paper It belongs to the radial clamping type diameter reduction where the workpiece does not move. The problem is that the working part of the diameter reduction mold adopts a multi-lobed structure, the mold is complex, the processing and assembly are difficult, and the cost is high. At the same time, the metal outer surface after diameter reduction It is inevitable that there will be slit marks on the valve mold, and it is difficult to meet the requirements for products with high size requirements

The axial extrusion method described in the paper belongs to the axial extrusion type diameter reduction of workpiece movement. The problem is that when the diameter reduction exceeds 1.2mm, it needs to be extruded in stages, the mold manufacturing cost is high, and the operation process is complicated. higher cost

[0004] CN201420571594, the radial precompression method described in the patent titled "A Combined Rubber Bushing Radial Precompression Die" belongs to the axial extrusion type diameter reduction of workpiece movement, and the existing problem is that the lower mold is divided into two parts: The upper block and the lower block have a two-layer structure. The working area is distributed on the upper block. The length of the working area is short. After extrusion, the product will have a size head problem. The assembly area and the working area are both circular holes, and the transition area is a tapered hole. When When the diameter reduction exceeds 2mm, the step of the taper hole in the transition zone is large, and the product jacket will be scratched after extrusion. At the same time, the structure in the patent cannot realize automatic operation, and the production efficiency is low.

[0005] CN201010133169, in the patent document titled "Rubber Bushing Squeeze Die", the radial pre-compression method described belongs to the axial extrusion type diameter reduction of workpiece movement, and the existing problem is that there is a guide structure, and the compression amount is relatively large It cannot be realized at the time, it is difficult to pick up the parts, and it is impossible to realize the requirements of mass production

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